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README.md

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+This library is intended to interact with button pluged on a ESP8266 using the Arduino SDK
+
+Code Example
+```Arduino
+#include <HIB.h>
+
+HIB *button ;
+HIB *button2 ;
+
+void onButtonPressed(uint8_t pin){
+  Serial.printf("Sketch on button %d pressed \n", pin);
+  }
+
+void setup() {
+  Serial.begin(115200);
+  // put your setup code here, to run once:
+  button = new HIB(0, HIGH, onButtonPressed);
+  button2 = new HIB(4, HIGH, onButtonPressed);
+
+}
+
+void loop() {
+}
+```